Should cable elevators be used?

Haha hah.. The consensus is there is no consensus.
Two camps and a no man's land minefield between.
I say IF you can hear a difference, then great, yes use cable elevators. If you can't, then you may use them, or skip them.
I use common toilet paper (empty) rolls for my short cables. Just one per side. Free.

I do the same as Elizabeth and noted a minute change but price is right!

a half roll of Charmin sounds the best. It increases the damping. Plus the highs are softer.

I just got some ceramic ones and thought they made a worthwhile improvement. I am currently recruiting a group of leprechauns to install and remove them while I am listening with my eyes shut so I can see if I can really tell the difference. That ought to make the blind test gang happy. Don't get the Mapleshade ones; three large Tinkertoy sticks with a napkin ring. Or I'll sell you mine if you want your patience exercised.

If they make you happy, then by all means use them.